blow count

blow count

1. The number of blows required to drive an object into soil.
2. In soil borings, the number of blows required to advance a sample spoon 6 in. (15.2 cm) or 12 in. (30.5 cm).
3. In pile driving, the number of blows required to advance the pile 12 in. (30.5 cm) or the number of blows per unit distance of advance.
References in periodicals archive ?
Built-in, automated quality assurance and quality control reporting includes the capture of start and end positions, time and elevation as well as actual embedment depth, blow count reporting, and inclination and orientation control.
Where: [([N.sub.1]).sub.60] is the corrected SPT blow count, [C.sub.ER] is the energy ratio
Compatible with 4 - 110 ton machines, the recently launched Doosan Closed Type Hydraulic Breakers 'make each blow count' - whether demolishing concrete or breaking rock.
To evaluate the liquefaction potential of the soil layer, it appeared that the standard penetration test blow count is the readily available parameter, and the simplified procedures proposed by Seed (1972) using blow count number is widely accepted.
Borings Every 1000-2500 Feet Along The Proposed Route For Transmission Main Installation (Depth Of 10 Feet) Reporting Of Boring Logs Including Continuous Sampling, Blow Count And Groundwater Level 1.
The relation between Liquefaction Potential ([10.sup.1.5M]/[??]x[r.sup.2]) and corrected SPT blow count ([bar.N]) as obtained in model "A" is given by the equation of the straight line separating the 'yes' and 'no' zones of liquefaction as,
Built-in, automated quality assurance and quality control reporting includes capture of start and end positions, time and elevation as well as actual embedment depth, blow count reporting, and inclination and orientation control.
Parameter Average Estimated COV (%) value Magnitude scaling NCEER COV(|MSF-1|)-22 factor, MSF Report Stress-reduction NCEER coefficient, [r.sub.d] Report COV(1 - [r.sub.d])=22 moist unit weights, Actual [[gamma].sub.m] data COV([[gamma].sub.m])= 9 (SP-SW) SPT blow count, Actual [N.sub.spt] data In this paper COV=30 Overburden NCEER COV(I-[C.sub.N])23.1 correction factor, [C.sub.N] Report Energy correction 0.95 9 factor.
Olympic champion Jones, from Flint, battled back from 2-0 and 3-1 down in the first two rounds of the final and levelled the contest at 4-4 in the third to force a sudden death decider in which the first scoring blow counted.
Results of soil samples extracted from the 20-plus-foot depths required to comply with the specified cover tolerances of the project plan indicated a clean alluvial silt and alluvial grout with minimal blow counts. The plan was to use a guided pilot system approach; but after excavating the first launch pit, and encountering cobble up to eight inches in diameter, followed by fairly hefty boulders, Rice was concerned.
"If someone is on your property who shouldn't be there, then the first blow counts for a lot."